The Basilica della Santissima Trinità di Saccargia stands in open farmland a short drive from Codrongianos, roughly 20 minutes from Sassari along the SS597. Consecrated in 1116 under Judge Constantine I of Torres, it was built by Camaldolese monks on the site of an earlier Benedictine complex, then extended by craftsmen from Tuscany who brought Pisan Romanesque techniques to the island.
The exterior is immediately recognisable: alternating courses of white limestone and dark basalt run across the facade and up the tall, slender campanile, making the church visible from a considerable distance across the valley. A central rose window sits above the portal, which is framed by blind arches and geometric decoration.
Inside, the single nave is narrow and simply lit, drawing attention to the semicircular apse, where a 12th-century fresco cycle survives — an unusual rarity among Sardinian Romanesque churches. Scenes include Christ in Majesty surrounded by apostles and angels. The name Saccargia is thought to derive from the Sardinian s'acca argia, meaning spotted cow, a reference to a local legend tied to the site's origins.
